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arxiv: 1304.4692 · v2 · pith:TDT6GVXSnew · submitted 2013-04-17 · 🧮 math.AC · math.AG

Local cohomology modules of a smooth Z-algebra have finitely many associated primes

classification 🧮 math.AC math.AG
keywords cohomologylocalassociatedfinitelymanymodulessmoothalgebra
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Let $R$ be a commutative Noetherian ring that is a smooth $\mathbb Z$-algebra. For each ideal $I$ of $R$ and integer $k$, we prove that the local cohomology module $H^k_I(R)$ has finitely many associated prime ideals. This settles a crucial outstanding case of a conjecture of Lyubeznik asserting this finiteness for local cohomology modules of all regular rings.

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